Yamada S, et al. - The specific ECG features of idiopathic right ventricular outflow tract (RVOT) premature ventricular complex (PVC)-induced cardiomyopathy (PVC-CMP) were assessed via analyzing 12-lead PVC morphologies in a total of 130 patients (49 males, mean age 44 years) with symptomatic and drug-refractory idiopathic RVOT PVCs undergoing radiofrequency catheter ablation (RFCA). The ECG parameters, including a wider QRS duration and higher peak deflection index, seemed to have potential for predicting the development of RVOT PVC-CMP, which could be successfully treated by RFCA.